Unlink Linked Devices in Signal: Full Guide

To unlink a linked device in Signal, open Signal on your primary phone, go to Settings > Linked Devices, find the device you want to remove, and tap “Unlink.” This immediately disconnects that device from your account, and it will no longer receive or send messages.

Why Linking Exists

Signal’s linked devices feature lets you use the same account on multiple devices—a desktop computer, an iPad, or a second phone. When you link a device, it gets a copy of your encryption keys, allowing it to encrypt and decrypt messages independently. This is different from simply mirroring your phone; each linked device is a full participant in your Signal conversations.

The feature is designed for convenience, but it also expands your attack surface. Every linked device is another place where your messages exist and another potential entry point if that device is compromised. That’s why managing your linked devices is a core part of Signal security hygiene.

How Linking Works

When you link a new device, Signal uses a QR code displayed on the new device. You scan it with your primary phone. This establishes a secure connection and transfers the necessary cryptographic keys. The linked device then operates independently, but it depends on the primary phone for certain administrative actions, like adding or removing other linked devices.

Each linked device has a name (like “Chrome on Windows” or “iPad”) and a last-seen timestamp. You can see these in the Linked Devices section of your Signal settings. The timestamp tells you when that device last connected to the Signal servers, which is useful for spotting devices you no longer use.

Step-by-Step: Unlinking a Device

1. Open Signal on your primary phone (the device where you originally registered your phone number).
2. Tap your profile icon in the top-left corner to open Settings.
3. Tap “Linked devices.”
4. You’ll see a list of all currently linked devices. Tap the device you want to remove.
5. Tap “Unlink” and confirm when prompted.

That’s it. The device is immediately disconnected. It will no longer receive new messages, and its existing message history (if any) becomes inaccessible from that device. The primary phone remains unaffected.

What Happens After Unlinking?

Once you unlink a device, that device loses access to your Signal account. It cannot send or receive messages, and it cannot re-link without scanning a new QR code from your primary phone. The device’s local copy of your messages is not automatically deleted, but it is encrypted and the keys are removed, so in practice the data is unreadable. If you want to be thorough, you can also delete the Signal app from that device.

On the primary phone, nothing changes. Your messages, contacts, and settings remain intact. You can always re-link the device later by following the same QR code process.

Common Problems and Fixes

If you can’t unlink a device, the most common reason is that you’re not on your primary phone. Only the primary phone can manage linked devices. If you’ve lost your primary phone, you’ll need to re-register your number on a new phone, which will automatically unlink all devices.

Another issue: the “Linked devices” option might be grayed out. This usually happens if Signal is updating or if you’re in a temporary network issue. Wait a few minutes and try again. If the problem persists, restart the Signal app.

If you suspect a device was linked without your knowledge, unlink it immediately and consider changing your Signal PIN. Your PIN protects your account recovery, and a compromised PIN could allow someone to link a device without your phone.

Security Considerations

Unlinking devices is a key part of keeping your Signal account secure. If you sell, donate, or lose a device that was linked, unlink it as soon as possible. Also, periodically review your linked devices list. If you see a device you don’t recognize, unlink it and change your PIN.

Signal’s security model assumes that your primary phone is trusted. If your primary phone is compromised, an attacker could link a new device without your knowledge. That’s why it’s critical to keep your phone’s OS updated and to use a strong lock screen. Signal also offers a registration lock feature that requires your PIN to re-register your number, which helps prevent someone from taking over your account.

Alternatives to Unlinking

If you don’t want to fully unlink a device but want to reduce its access, consider simply logging out of Signal on that device. Logging out is different from unlinking—it removes the local data and requires you to re-link with a QR code the next time you want to use it. Unlinking is more permanent and is the recommended way to remove a device you no longer own or trust.

You can also pause notifications on a linked device by putting it in “Do Not Disturb” mode, but that doesn’t stop message delivery. The only way to stop a device from receiving messages is to unlink it.

Frequently Asked Questions

Can I unlink a device from the device itself?

No. Only the primary phone can unlink devices. The linked device has no option to remove itself. If you’re on a linked device and want to disconnect, you must use the primary phone or simply delete the Signal app from that device.

What if I lost my primary phone?

If you lose your primary phone, you can re-register your number on a new phone. During re-registration, Signal will ask for your PIN. Once you re-register, all previously linked devices are automatically unlinked. If you don’t have your PIN, you may be locked out temporarily, but you can still regain access after a waiting period.

Does unlinking delete messages from the linked device?

Unlinking removes the encryption keys from the linked device, making its local message database unreadable. The messages themselves are not physically deleted from the device’s storage, but they become inaccessible. For full removal, delete the Signal app from that device.

Can I relink a device after unlinking?

Yes. Simply open Signal on the device you want to relink, choose “Link as new device,” and scan the QR code with your primary phone. The device will be re-added to your account, but it will not have any previous message history.

Why is there a “last seen” time on linked devices?

The “last seen” timestamp shows when that device last connected to Signal’s servers. It helps you identify whether a device is still active. If a device shows a very old timestamp, it’s likely unused, and you might want to unlink it to keep your account tidy.

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